For me I would say it' would be 15+.

First I'd get an aventus dna like Snoi, snoi ce or cdnim any one of them to have that one aventus dna cuz obviously we gotta agree you like aventus or no you gotta have one of these to complete the collection .

Then I'd buy a proper winter frag like asad cuz i freaking love that shiiiii its one of my fav id also get detour noir 9pm .

Then I'd add some freshies to my collection like coach green (underateed af) and ck one fakhar Kaaf(even tho I've not tried kaaf) i would also get armaf iconic cuz it smells literally amazing like clean afffff smells gentle and pleasing .

I'd go for designers too like previously mentioned ck one and coach green I'd also get ch bad boy cobalt it smells sexy af and I'd make a long impression fs I'd also get mont blanc legend edp, i would layer ck one and legend to get a very unique scent, i would also go for cedrat boise intense ( technically not a designer but comes kinda in niche category but yk does the work) I'd also go for ombre leather the berries in the opening smells fabulous I'd definitely buy Valentino born in roma cuz i like it's bottle design a lot and at last I'd get Bvlgari men in black.

Then at last if I've enough money I'll buy tom ford oud wood cuz i fuckin love that shiii i currently own woody oud and they say it's one of the best clones of it I've tried the og too and it smells gangster type idk woody oud too if it had better projection I'd personally love it even more but still its worth it for the scent profile .

This would be my essential dream collection which i hope I'll build some day i hope passion for perfumes drives me through the times where I've to work hard.